Marzia also shared a post on Instagram, including several photos taken at the wedding.
The 26-year-old penned a sweet caption that revealed just how significant the day was for the famous couple.
"Yesterday, the 19th of August - after exactly 8 years since we met - we celebrated our wedding with our closest friends and family," she wrote.
"It was the most beautiful day, which I will treasure forever. I am so thankful for all the people that made time to attend the event and helped us celebrate our marriage. I feel like I’m the luckiest person and I’m so full of love. Incredibly ecstatic to be able to call Felix my husband for the rest of our lives."
According to The Daily Mail, the pair met online in 2011, with Marxia moving to Sweden to live with PewDiePie just six months later.
Marzia was a known fan of her future husband's online career (before they met, her screen name was CutiePieMarzia).
The couple has since joined Joe Sugg, Zoella and Alfie Deyes by moving to the YouTuber hotspot of Brighton, UK.
PewDiePie and Marzia are one of the most followed couples in the world, sharing 107 million YouTube subscribers, 24 million Instagram followers and 22 million Twitter followers.
However, Marzia reportedly left her YouTube channel in October last year after uploading a farewell video to her subscribers.